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Farmall & IHC Tractors Discussion Forum
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240 U starter-how many fields

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Al L. in Wisc.

09-19-2005 17:04:59




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My 240 Utility turns over soooo sllloooww. When the starter was off, we were surprised to see only two fields...well, I didn"t know. So my ? is, should the starter have four? Bearing(s) are bad as there is forward/back play on the starter shaft. How do you go "bout gettin" this thing to spin over faster-thanks in advance.




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Billy McCarver

09-29-2005 00:33:03




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 Re: 240 U starter-how many fields in reply to Al L. in Wisc., 09-19-2005 17:04:59  
Most 6Volt starters only have two fields. At best, they would barely turn over fast enough to start the engine. Is your tractor 6V or 12V. If it is still 6v, check the size of your cables, they should be at least as big around as your finger. Generally #2 or larger. 2-0 welding cable works well. Any dirt, corrosion, burned wires will build up resistance in the starter circuit. It doesn't take much. Most tractors had the ground cable from the battery connected directly to one of the mounting bolts of the starter or nearby. Also check the field windings where they come together at the post. My grandfather used to crank on the nut to tighten the connection and would twist the post and break it loose from one or both windings. One field winding and it would turn too slow to start on 6v. Both broken loose and nothing turned. One way to check would to jumper 12V to the post. If the starter turns fast enough to start the tractor then one field winding is loose. Also check the brushes and commutator for dirt. Good luck with this. Billy

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John T

09-19-2005 19:45:40




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 Re: 240 U starter-how many fields in reply to Al L. in Wisc., 09-19-2005 17:04:59  
Al, before I suspect a starter, I FIRST suspect the battery,,,,, ,,or bad or carboned up battery or starter or ground cables or connections,,,,, ,,,then starter switches or solenoids,,,,, ,,,,, then big enough battery n starter n ground cables (I prefer 00 Gauge on 6 volt),,,,, ,,,,,then a poor ground like to a rusty or sheet metal battery box or seat etc. Its best to ground on a good clean main bolt close to the starter as possible versus rusty sheet metal. I suggest you remove, clean n wire brush, n reattach each n every battery n starter n ground cable and have the battery load tested or try a known good substitute to see if that helps.

If when cranking the battery voltage dont drop much and/or the lights dont dim badly, I suspect more a bad solenoid or starter switch or bad connection or ground, while if she cranks slow and the lights dim wayyyyy yyy down, then I suspect the starter more like a dragging armature or worn brushes etc.

John T, retired electrical engineer in Indiana

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240 ed in Wi

09-19-2005 18:52:46




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 Re: 240 U starter-how many fields in reply to Al L. in Wisc., 09-19-2005 17:04:59  
My 240 was the same way when I got it. Can't help with the starter but I know what fixed mine. Both of my battery cables were way too small, they were too long, and they had the clamp on replacement ends, all of which adds up to lots of resistance. That tractor turned over fine when it was new, it should now. Find brand new cables that are just the right length, are 0 or 00 gauge, and have soldered on ends. Cables for a 12 volt application will not work, you need something much heavier. Keep the battery terminals shiny, sand any paint or rust off where the ground cable attaches. I even sanded the washers and the nut that hold the cable to the starter. As long as the battery and the starter are in shape she will spin just fine. Hope this helps.

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